In this topic about the fundamental network, start with physical layer until application layer,

So i think network engineer should be has concept about network OSI layer because

it’s standard that help to everyone that can work with many production about network or security

Network OSI Layer

  • Application layer: This layer like a browser, program and application
  • Presentation Layer: JPEG, PNG
  • Session Layer: Control traffic from source to destination that smoothly like cookies session
  • Transport Layer: Work with TCP/UDP about service port (FTP, SMTP)
  • Network Layer: About IP Network identity about host device
  • Data Link Layer: Relate Mac Address for hardware devices, for define source and destination hardware
  • Physical Layer: This’s logical system like binary ( 0 1 0 1 0 1 0), Transmits with binary via phisical

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